Siphon.



G. R. NICHOLSON.

SIPHON.

APPLICATION FILED Mms. 19u.

me Mamas mens m., Fumo-umm. wAsNINcmN, n. L,

Shall fall,l said admission of air' preventing l ...STATES FATENTDFFICE.

GEQSGE ROBERT'NICHQLSON, 0E @SINN-rms; ENGLAND.: ,c

k'1,274.57S1. f

To all whom it may concern: Il f f Be it knownfthat LGnonen ROBERT NIGH- oLsoN, al Subject of the fKing' of .Grreatt Britain and Irelan'd,residing vat Crot-omTees, inthe county of Durham, England,-,have invented new and'.usefullmprovements1 in Siphons, off which thefollowing is a Specification.' z. This inventionrelates toV Siphonsof. the type in which'traps are-provided atboth f endS for the purpose of Apreventing the access of air to the Siphon with means for admit- 'tingair to the outletat the level to vwhich itis desiredthat the level of the .liquidin the tank from which the liquid is being drawn the Siphon from becoming emptied. "The object of this invention is toprovide anim- 'pr'oved Siphon so thatthe rate of delivery of the liquid'throughthe: Siphon maybe im;-

Accordin'gfto this invention we provide la supplemental Siphon at the outlet endof the main Siphon. The vent pipe for thefpurpose of admittilg air to the Outlet is disposed'between 7the bend ofthe supplemental Siphon a'n'dthe outlet trap ofthe main Siphon, Said :vent pipe extendingtoabove the'b'endof the supplemental Siphon; `Preferably-the outlet of the' Supplemental Siphon is' alSo'tr-apped.

Twill fully describe 'myinvention with reference `to ,thev aoco',rnpanlying'I drawings wherein-'e` i" Figure 1 iS a Sectional; elevationj'of one construction of compoundisiphon yin accordf ance with my' inventiong and Figs. 2, `3 ,andekk are part similar views illustrating"modilications Referring to Fig. l, the Siphon therein" illustrated comprises a main Siphon a and a supplementary Siphon o. The main Siphon a has an inlet at c and an outlet at d, said inlet and outlet being trapped at e and f respectively. The Supplementary Siphon b has an inlet at g and an outlet at h, the inlet g of the Supplementary Siphon being connected to the outlet al of the main Siphon. The height of the bend j of the main Siphon may be varied as desired below the limit fixed by atmospheric pressure. The lower edge r; of the bend moi? the Supplementary Siphon 1S preferablyV at the Samelevel as the inlet o but may be varied, though it is essential that it Should be above the inlet trap e. Opening out of the Siphon pipe between the bend m and the outlet trap f iS a vent pippe n which Specicatioirof Letters -IE'atent.

I I Application filed-March 8, 19,17: Serial No. 153,527.

is .trappedat 0 and entends above the bend m and Vis normallyl opento air.: Theinlet c is preferablyformed with a hood-p to prevent eddying of the liquid as it is drawn intothe Siphon. llnstead'of .the hood p, Iinaypro the Same purpose. i r The operation of my compound Siphon is as-ffollowsz-- f Y The inlet c is arranged to open out of Ithe bottonior near the bottom of the tank or the 'liketo be emptied and the Siphon ischarged,

.vide-a suitably Supported cap g .arranged Y lover-theinletc, asindicated in Fig. 2, for

liquid in the tank falls, the pressure tending Y.

to carry the liquid overthebend y' fails, and the pull exerted by the; Supplementary Siphon draws the liquid out of thefwenty pipe n andthe'. air enters and breaks the 'column of liquid passing through the Siphon.

Thesiphoni'eactionthen Stops, but the main Siphon a'remains'charged, the liquid Stand- 'ingk in the inletlc; outlet: d and vent pipe 'n to fthe'level of the loweredge. k of the bend The uncovering vof l the ginletv c does not affect the liquid in the main Siphon a which liquidi is"retain'ed byfthetrapls @and ffso `-that, when the main Siphon as once been primed, it remains primed and ready to act. Any small quantity of liquidentering the tank out of which the inlet -c opens will be taken up by the Siphon and a Similar quan- `tity displaced over the edge la into the outlet la.. Should a large quantity of liquid enter the tank, all the air will be driven out of the bend m, and the Siphon will operate until the tank is again emptied. The eil'ect of the vent pipe n iS to break the column of liquid in the supplementary Siphon b when the head of liquid in the inlet tank falls and before any air can be drawn through the inlet trap e.

I prefer to provide the outlet h of the supplementary Siphon b with a trap r as shown in Fig. 3 which trap will preventair leaking erate at full bore from the' inlet 0 to the out-j let It when there is a Suflioient head of liquid in the inlet tank. The outlet t may be eXi" tended to any desired length.

Fig. 3 also' illustrates a modified construction of the vent pipe n in which the trap( 0 is replaced by a downwardly-extending lip s. The vent pipe n is closed at its lower end. The actionV of this construction of vent pipe iS exactly the same as that above described.

Fig. 4t illustratesy a modified arrangement of the Supplementary Siphonl b which in this case is turned in toward the main Siphon to economize space.

A compound Siphon in accordance with this invention, after it has once been primed, is perfectly automatic and adjusts itself to any iow from a mere dribble to full bore. It iS simple and will not readily get out of order aS there are no valves to` wear or choke. My compound Siphon has been speci-ally designed for dealing with an intermittent Supply of liquid, and iS particularly applicable for draining colliery workings which are liable to be flooded after rain as it Starts immediately the liquid as the inlet c rises above the lever of the edge 7c.

What I claim and desire to secure by Let'- terS Patent'is 1. A compound Siphon comprising the combination of a main Siphon having a bend always above the level of the water at the Source of supply from which the water is to be drawn, a trap at the inlet of Said main Siphon, a trap at the outlet from Said main Siphon, a supplementary Siphon, the inlet of Said Supplementary Siphon being connected to the outlet of Said main Siphon, a trapped vent pipe opening out of the compound Siphon at a point between the bend of said supplementary Siphon and the outlet trap of Said main Siphon, Said vent pipe having Gopies of this patencvmay` be obtained for an orice always open to the atmosphere and extending to a level abovethe level of the water at the Sou-ree of Supply.

Y 2.' A compound Siphon comprising the V"combination of a main Siphon having a bend always above the level of the water at the source of'supply from which thel water iS to be drawn, a trap at the inlet of Said main Siphon and means formed on the trap for preventing eddying of the liquid in the main Siphon, a trap at the outlet of said main Siphon, a supplementary Siphon, the inlet of which is connected to the outlet end of said main Siphon, a trapped vent pipe opening out of the compound Siphon at a point between the bend of said supplementary Siphon and the outlet trap of said main Siphon, Said vent pipe having an orifice always open to the atmosphere and extending to a level above the level of the water at the Source of Supply.

3. A compound Siphon comprising the combination of a main Siphon having a bend always above the level of the water at the source of Supply from which the water is to be drawn, a trap at the inlet of Said main Siphon, a hood carried by the inlet end of said main Siphon, a trap at the outlet of said main Siphon, a Supplementary Siphon at the inlet end of which is connected the outlet end of said main Siphon, a Vtrapped vent pipe opening out of the compound Siphon at a point between the bend of said Supplementary Siphon and the outlet trap of Said main Siphon,- said venty pipe having an orificealways open to the atmosphere and extend-ing to a level above the level of the water at the Soureeof supply.

In testimony whereof I have signed my name to' this specification in the presence of two Subscribing witnesses.

GEORGE ROBERT NICHOLSON.

Witnesses:

HERBERT HOWARD, GEORGE HAROLD APPLn'roN.

uve cents each, by addressing' the Commissioner of Patents, Washington; D. C. 

